Rotary compressor.



Y F. s. STRITB.

ROTARY COMPRESSOR. APPLICATION FILED JUNEV 4,1913.

1,1 17,461, Patented N0v.17,1914

2 SHEETS-SHBET 1.

lwvwntoz FRANK 5. STRWE @vi/mesmo P. S. STRITB.

ROTARY COMPRESSOR.

APPLICATION FILED JUNE 4,1913.

Patented Nov. 17, 1914.

2 SHEETS-SHEET 2.

FRANK S. STRITE, OF SEATTLE, WASHINGTON.

ROTARY COMPRESSOR.

inlener.

Application filed June 4, 1913.

To all whom it may concern` Be it known tha'trl, FRANK S. S'rnrrn, a citizen of the United States, residing at Seattle, in the county of King and State of llashington, have invented certain new and useful Improvements in Rotary Compressors, of which the following is a specification, reference being had to the accompanying drawings.

rlhis invention relates to new and useful improvements in air and gas compressors and more particularly to a rotary internal compressor and my object is to provide a device of this character which will efficiently compress air and gas whereby the same will have a maximum amount of pressure and, at the same time, require a minimum amount of power in the operation of the same.

A further object of the invention resides in providing a device wherein the compressor cylinders rotate bodily as the device is operated and a still further object resides in providing improved means for the actuation of the piston with the compressor cylinders as the latter are rotated.

A still further object of the invention resides in providing a device which is simple and durable in construction, inexpensive to manufacture and one which will be very eicient and useful in operation.

With these and other objects in View, the invention consists in the novel features of construction, combination and arrangement of parts as will be hereinafter referred to and more particularly pointed out in the specification and claims.

In they accompanying drawings forming a part of this application, Figure 1 is a side elevation of the device with parts in section. Fig. 2 is a vertical transverse section therethrough as seen on line 2-2, Fig. 1. Fig. 3 is an enlarged vertical longitudinal section through one of the cylinders and the adjacent parts thereof; and Fig. 4 is a vertical section as seen on line 4-4 Fig. 1, looking in the direction of the arrow.

In describing my invention, I shall refer to the drawings in which similar reference characters designate corresponding parts throughout the several'views and in which 1 indicates a base plate of any desired size and shape, which has mounted at the ends thereof the pedestal bearings 2 and 3 and rotatably mounted in these bearings and extending longitudinally of the base plate, is

Specification of Letters Patent.

Patented Nov. 17, 1914.

Serial No. 771,728.

a main shaft 4. This shaft is mounted in the bearings 2 and 3 on bearing balls and held in proper )osition therein by any suitable means. Tiiis main shaft 4 is adapted ,to have coperation with a motor or any other desired power driven means (not shown) so that the same may be rotated in the bearings, when desired.

Seemed to the inner face of the pedestal bearing 3 and extending inwardly therefrom, is a tubular-like casting 5 which rotatably receives therethrough a portion of the main shaft 4 and formed on the outer free end of this casting 5, is a head portion or the like 6, which is so inclined with respect to the other portion of said casting as to be said to be disposed at an obtuse angle to the longitudinal plane thereof. This head portion 6 has a race-way or groove 7 therein which is also disposed 1n the same plane as the head proper, the purpose of which will be hereinafter and more particularly described.

A portion of the shaft 4 is enlarged in diameter, as shown at 8, and mounted on said enlarged portion in spaced relation to one another, are the disks 9 and 10. Mounted securely between said disks at diametrically opposite points thereon, are the cylinders 11, said disks 9 and 10 forming heads therefor. It might here be also stated that said disks 9 and 10 are held together securely by means of the tie rods 12, thus securely retaining said cylinders in position therebetween. Slidably mounted in said cylinders 11, are the pistons 13, the rods 14 of which are slidably disposed through enlarged openings in the disk 10. The outer ends of said piston rods 14 are suitably engaged with the ends of arms 15 which are formed on a member 16, the latter being rotatably mounted in the lggroove or race-way 7 of the head portion 6 on said casting4 5. This member 16 is mounted on bearing balls in the race-way 7 and guide arms 17 are provided on the disk 10 which project outwardly to engage the arms 15 so that when said shaft 4 with the parts thereon is rotated, the arms 15 on the member 16 will also be rotated. It is obvious, from the construction shown and described, that as the cylinders are bodily rotated, with the shaft and the member 16 is rotated therewith, the pistons 13 will be reciprocated in the cylinders, such action being due to the inclined position of the head portion G and the corresponding position of the rotating member 16 thereon. The member 16 is rotated in a plane angular to the plane of rotation of the cylinders so that any connection between said member 16 and the pistons in said cylinders will cause said pistons to be reciprocated.

Secured to the outer face of the disk 10, adjacent its outer periphery, is the outerl end of a bowl-like housing or casing 18, the latter receiving therethrough the casting 5 to entirely inclose therein the head portion 6 of the same and the member 16 with its projecting arms 15. This housing or casing 18 is secured to a collar 19 which'is loosely applied on the casting 5, the latter being properly packed on said casting to make the inclosure within the housing 4or casing 18 substantially air-tight.

The casting 5 is provided with a air of longitudinal channels 20 which are ent at their terminals to extend through the outer wall of said casting and the one end terminal of each -of the channels is disposed within the inclosure of the housing or casing 18. The latter terminals of the channels 20 may be termed the inner ends thereof and the outer ends of the same may be said to be the inlet ports for air and gases. Thus as air or gases are drawn, in the inlet ports, the same may be conveyed through the channels 20 tc the inclosure within the housing or casing'S. After entering the inclosure referred to, the air or gas is adapted to be drawn by suction into the cylinders 11 the entrance of said air or gas being through openings inthe vdisk 10.

Each piston head has a Valve seat 21 formed in the outer face thereof in which is adapted to be seated the valvel 22, the stem of the latter being guided through a socket or the like in theuopposite face of said piston head. A coil spring encircling said stem between the last mentioned face of the head 13 and a collar on said stem normally forces the valve 22 to its open position away from the seat 21. Each piston head lis also provided with channels 23 through which the air and gaswithin the cylinder may pass as the piston is reciprocated and as each piston head is hollow, the air and gas entered therewithin, through the channels 23, is adapted to be assed through the opening in the opposite face, caused by the disposition of the valve 22 to its open position. These valves in the piston heads may be termed suction valves.

The disk 9 is provided with openings in alinement with the openings 21 of the piston heads, said openings being designed to form valve seats 24. Vali es 25 are provided for said seats 24 and valve casings 26are secured to the outer face of the disk9 to operatively support said valves 25. These valves are normally held in their closed positions by means of coil springs suitably mounted in the casings and having connection with the stems of said valves and each of the casings 26 has a tubular pipe or connection 27 leading therefrom and connected to the enlarged portion 8 of the shaft 4. These tubular portions 27 communicate with' the interior of the casings 26 and lead to lateral channels 28 in the enlarged portion of the shaft, said latter channels communicating, inturn, with a longitudinal bore 29 formed in the one end of the shaft 4. This longitudinal bore extends to the extreme free end of sai-d shaft 4, whereby air and gas conducted from the casings 26 may be congas is discharged therethrough to the bore or channel 29 in the shaft 4. y Formed on the pedestal 2, is an arm or bracket 30 which has a head or the like 31 formed on the free end thereof to receive therein the llast mentioned free end of the shaft 4f. A chamber 32 is provided in the head 31, which communicates with the bore 29- of the shaft 4.-,- whereby the gas and air conveyed from the casings 26 may be discharged therein and a main discharge pipe 33 communicates with the chamber 32, said pipe leading therefrom to anydesired point. 1n practice, power is first applied to the one end of the main shaft 4 to rotate the latter and with the rotation of said shaft, the disk members 9 and 10 carrying the cylinders will also be rotated, thereby causing the casing member 16 with the arms 15 thereon to be rotated. llt is obvious, that as this member- 16 is rotated, in a lane angular to the plane of rotation o the cylinders 11, the pistons in the latter will be'caused to reciprocate in View of their connection with the arms 15. With the reciprocation of said pistons, air or gas will be sucked in through the inlet openings of the channels 2O and drawn into 'the inclosure within the housing or casing 18, where said air or gas is, in turn, drawn into the cylinders' 11. The valves 25 are, obviously, closed in their normal position in view of the connection of the springs therewith and upon the rearward stroke of the y pistons, the valves 22 of the latter are held in their` open positions by means of the springs in connection with the same. rearward stroke of the pistons permits the air and gas which is sucked in the cylinders to be forced through the channels 23 in said piston, through the latter into the opposite ends of the cylinders. Upon the forward or return stroke of said pistons, the air or gas will be compressed in the last mentioned ends of said cylinders, the valves 22 being forced to their closed positions .under pressure of said air or gas. At the same time .forced through the openings which are closed by the valves 25, the compressed fluid being forced through the casings 26 and through the outlet pipes 27 to the bore 29 of the main sha ft 4. The compressed Huid isthen conveyed to the chamber where it is discharged through tlie main discharge pipe 33 to any desired point. As long as the shaft '-'l is rotated, 'the compressor will vbe effective in its operation.

efficient means for carrying out the objects of the invention and while I have particularly described the elements best adapted to perform the functions set forth, it is obvious that various changes in form, proportion and in the minor details of construction may be resorted to without departing from the spirit or sacrilicing any of the principles of the invention.

While, in my device, I have shown but a pair of cylinders in connection with the disks 9 and 10, it will be understood that as many cylinders may be rovided as are found desirable. In provi ing these cylinders, however, two or any mu tiple thereof, are preferable,

Having thus described this invention, what is claimed is zl. In a rotary compressor', the combination with a base member, bearings mounted thereon, and a shaft rotatably mounted in said bearings; of a plurality of cylinders mounted in connection with saidshaft to rotate with the latter, pistons mounted in said cylinders to reciprocate therein, a housing mounted in connection with the heads of said cylinders to also rotate therewith and with said shaft, a tubular casting mounted on one of said bearings and rotatably receiv ing said shaft therethrough, said casting also being disposed through the central portion of said housing, a head formed on the outer end of said casting and arranged within the housing, a member rotatable on said head on a plane at an angle to the plane of rotation of said cylinders, connectiiufg means between said member and the j'i1- ;tooi-a of said cylinders, whereby to rer* :in said pistons as the cylinders a re rot ad, rcciprocation of said pistonsI causing l i lu' 'to be drawn into the housing and correspondingly into the cylinders.

2. In a rotary compressor, the coinoiuation with a base, bearings mounted tl'icrcfm.,

and a shaft rotatably mounted in said bearings; of a plurality of cylinders mounted on said shaft to rotate therewith, pistons reciprocally mounted in said cylinders, a housingI mounted in connection with said cylinders to rotate therewith, a tubular casting formed on one of said bearings and rotatably receiving said shaft therethrough, the outer cnd of said casting being received `within the aforesaid housing, and said casting being also provided with longitudinal channels, the one terminal of each of which is disposed within 111e housing and theother terminal thereof disposed therebeyond, a member rotatably mounted on the casting within the housing and havin connection with said pistons, the plane o rotation of said member being angular to the plane of rotation of said cylinders, whereby to cause said pistons to be reciprocatcd as the cylinders are rotated with the shaft, the reciprocation of said pistons causing fluid to be drawn through the channels of said casting into the housing and correspondingly into said cylinders. Y

3. In a rotary compressor, the combination with a base, bearings mounted thereon, and a shaft rotatably mounted in said bear ings; of a plurality of cylinders mounted in connection with said shaft to rotate with the latter, pistons reciprocally mounted in said cylinders, a housing mounted in connection with the rotating cylinders, a casting carried on one of said bearings and rotatably receiving said shafts therethrough, the free end of said casting being rovided with a head member disposed wit in the housing and said head member being provided with a groove therein arranged in a plane angular to the plane of rotation of said cylinders, a member rotatably mounted in the groove of said head member, said rotatable member being provided with arms having connection with the pistonsin said cylinders, whereby to reciprocate said pistons as thc cylinders are rotated, the reciprocation of said pistons causing fluid to be drawn into the housing and correspondingly into the cylinders.

,l. In a rotary compressor, the combination with a base, bearings mounted thereon. and a shaft rotatably mounted in said bearings; of a pair of disks mounted on said shaft in spaced relation to one another. cylinders mounted between said disks, throne disk being provided with enlarged openings to provide open ends for said cylinders and the other disk boing designed to provide heads for the oppositi` ends of said cylinders, pistons reciprocally mounted in said cylinders and having the rods thereon disposed through the enlarged oifienings or the first mentioned disk, said openings in the last mentioned disk being also adapted to admit fluid into the cyliiu'lon: as said pistons are reciprocated, a housing mounted in connection with the last mentioned disk to rotate therewith, a casting mounted on one of said bearings, and rotatably receiving said shaft therethrough, the outer end of said casting being received Within the aforesaid houslng, means in connection with the outer end of said tubular casting and having connect-ion with the piston rods to reciprocate said pistons as the cylinders are rotated, the reciprocation of said pistons 1,1 meer causing Huid to be drawn into the housing and correspondingly into the cylinders, said duid being drawn into said cylinders through the enlarged openings of the rst 15 mentioned disks.

In testimon whereof 1I hereunto ax my signature in tbe presence of two Witnesses.

FRANK S. STRTE. Witnesses:

J. H. MENDENHALL, S. 1E. Fnnnns. 

